/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.heron.api.windowing;

import java.util.List;

import org.apache.heron.api.tuple.Tuple;

/**
 * Holds the expired, new and current tuples in a window.
 */
public class TupleWindowImpl implements TupleWindow {
  private final List<Tuple> tuples;
  private final List<Tuple> newTuples;
  private final List<Tuple> expiredTuples;
  private final Long startTimestamp;
  private final Long endTimestamp;

  public TupleWindowImpl(List<Tuple> tuples, List<Tuple> newTuples, List<Tuple> expiredTuples,
                         Long startTimestamp, Long endTimestamp) {
    this.tuples = tuples;
    this.newTuples = newTuples;
    this.expiredTuples = expiredTuples;
    this.startTimestamp = startTimestamp;
    this.endTimestamp = endTimestamp;
  }

  @Override
  public List<Tuple> get() {
    return tuples;
  }

  @Override
  public List<Tuple> getNew() {
    return newTuples;
  }

  @Override
  public List<Tuple> getExpired() {
    return expiredTuples;
  }

  @Override
  public Long getStartTimestamp() {
    return startTimestamp;
  }

  @Override
  public Long getEndTimestamp() {
    return endTimestamp;
  }

  @Override
  public String toString() {
    return "TupleWindowImpl{" + "tuples=" + tuples + ", newTuples=" + newTuples + ", expiredTuples="
        + expiredTuples + '}';
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }

    TupleWindowImpl that = (TupleWindowImpl) o;

    if (tuples != null ? !tuples.equals(that.tuples) : that.tuples != null) {
      return false;
    }
    if (newTuples != null ? !newTuples.equals(that.newTuples) : that.newTuples != null) {
      return false;
    }
    return expiredTuples != null ? expiredTuples.equals(that.expiredTuples)
        : that.expiredTuples == null;

  }

  @Override
  public int hashCode() {
    int result = tuples != null ? tuples.hashCode() : 0;
    result = 31 * result + (newTuples != null ? newTuples.hashCode() : 0);
    result = 31 * result + (expiredTuples != null ? expiredTuples.hashCode() : 0);
    return result;
  }
}
